Read Sharp XE-A303 (serv.man4) Service Manual online
XE-A303 (V)
CIRCUIT DIAGRAM AND PWB LAYOUT
– 18 –
CPU
1/7
C
D
B
A
C
D
B
A
876
5
4
321
8
76
5
4
321
Not Install
3-2 BOOT MODE (MUST BE
IPL MODE)
1-2 NORMA
L
from KEY
I/F
3-2 IPL MO
D
E
1-2 NORMA
L
KIA7045 SOT-
8
9
12
3
NEAR TO R
P
NEAR TO C
P
U
NEAR TO CP
U
NEAR TO CP
U
NEAR TO IC
2
NOT INSTAL
L
NOT INSTAL
L
NOT INSTAL
L
NOT INSTAL
L
IC1 P:21
FLASH M30625FGPGP
IC1 P:19
NEAR TO IC
1
2
13
13
B
2SC1815
EC
not install
V4,V6,V8
V7
R58
R59
USE
2
-
1
E
S
U
MODEL
CPU ROM WRI
T
E
1-2
1-2
2-3
FLASH ROM WR
I
T
E
1-2
NORMAL
SP2
SP1
2-3
modified 07/
0
8
modified 06
/
0
1
NOT MOUNT
NOT INSTAL
L
06/07/0
6
INSTALL
NOT MOUN
T
NOT MOUNT
NOT INSTAL
L
06/07/
0
6
POFF#
VHC
O
M
1
PH1
1
PH12
I10
PH02
I00
PH01
RJR
BLON0
BLON1
PCLK
0
I01
PCLK
1
DREQUSB#
VHCO
M
0
PDA
T
0
A2
HUS1
HUS0
PES0
CS0#
CS1#
VPTE
S
T
1
HT
EM
P
1
VPTE
S
T
0
HT
EM
P
0
KR8
KR9
KR10
KR1
1
PES1
A7
BUZZER
A[0..7]
RESUS
B
#
RO
M
B
A
N
K
R
A
M
BANK
RD#
INTUSB
#
I1
1
PDA
T
1
LCDE
LCDRS
LCDR
W
LCDCS#
PES
O
N
STR
B
1
3
#
S
T
R
B
01#
STR
B
0
2
#
S
T
R
B
03#
LA
T
1
#
STR
B
1
1
#
S
T
R
B
12#
A3
LA
T
0
#
ALE
#
A4
TXD
RXD
SRXD
STX
D
HOLD#
CS3#
CS2#
WR#
D[0..7]
A6
A5
A1
A0
A10
A16
A9
A17
MODR
A13
A12
A14
A15
A18
A1
1
A[8..19]
A8
A19
KS
0
KS
1
KS
2
KS
3
D2
D7
D6
D5
D4
D3
D1
D0
FRDY
MOD
E
L
1
LCDON
KR3
VPO
N
KR2
KR0
KR1
DR
KR6
KR7
KR4
KR5
CNVS
S
CPURE
S
E
T
#
VHCO
M
1
5
KS
0
2
HT
EM
P
0
5
HUS0
5
KS
1
2
KS
2
2
PCLK
1
5
HT
EM
P
1
5
KS
3
2
VPT
E
S
T
0
5
D[0..7]
2
KR[0..7]
2
VPT
E
S
T
1
5
BLON1
2
A[0..7]
2
BLON0
2
A[8..19]
2
LA
T
0
#
6
STR
B
1
3
#
6
HUS1
5
STR
B
0
1
#
6
STR
B
0
2
#
6
PES0
5
STR
B
0
3
#
6
PES1
5
STR
B
1
2
#
6
PDA
T
0
5
KBR
8
2
STR
B
1
1
#
6
VHC
O
M
0
5
U
S
BRESET#
3
LA
T
1
#
6
KBR
9
2
PDA
T
1
5
CS0#
2
CS1#
3
CS2#
2
KBR1
0
2
CS3#
2
RJR
2
ROMB
A
N
K
2
RAM
B
A
N
K
2
WR#
2
KBR1
1
2
MODR
2
PCLK
0
5
INTUSB
#
3
POFF#
3
I01
5
I10
5
I00
5
PH02
5
PH01
5
I1
1
5
PH1
1
5
PH12
5
CPURE
S
E
T
#
2
ALE
#
LCDE
2
LCDRS
2
LCDR
W
2
LCDCS#
2
PE
S
O
N
5
RESET#
3
CNVSS
2
DREQUSB#
3
RD#
2
VP
O
N
2
VCC
7
VDD
7
FRDY
LCDON
3
DR
3
F
R
O
M
RESET
2
VDD
VDD
VCC
VCC
AV
C
C
VCC
VCC
VCC
VCC
VDD
VCC
VCC
VDD
AV
C
C
VDD
VCC
VCC
VCC
VCC
VDD
VDD
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VCC
VDD
VCC
VCC
VCC
VCC
VCC
RP11
3
3
3
2
1
4
5
6
7
8
C1
15
0.1uF
C1
0.1uF
R61
0
R86
10
K
R77
1K
RP1
10
K
3
2
1
4
5
6
7
8
R82
330
R34
100
K
C4
33pF
C21
91pF
C18
0.1uF
R1
1
10
K
CN1
T
E
ST
PI
N
1
2
3
4
5
C5
33pF
C1
19
0.1uF
C17
33pF
C9
1uF
R55
0
R58
10
K
C1
13
0.1uF
X2
C
S
TL
S1
6
M
M
U
R
A
TA
2
3
1
R30
10
K
RP6
10
K
3
2
1
4
5
6
7
8
TP1
C6
33pF
RP3
10
K
3
2
1
4
5
6
7
8
C1
16
0.1uF
IC2
KIA7045A
F
1
2
3
R85
10
K
R66
47
K
R28
10K
R54
0
B
+
BZ1
PIEZO BZ PKM22E
P
P
H
4
0
0
2
R12
10
K
R1
10
K
R93
3.3K
RP7
10
K
3
2
1
4
5
6
7
8
R29
10
K
MASK M30623MEP-A93GP
IC1
32
17
49
24
38
8
1
18
63
41
15
29
23
21
14
45
57
22
26
40
6
33
12
58
27
42
13
7
16
30
28
53
35
9
36
55
3
61
44
62
20
59
48
52
56
11
54
50
25
10
2
31
46
64
4
34
19
37
43
47
60
51
5
65
66
67
68
69
70
71
72
66
67
68
69
70
71
72
79
78
77
76
75
74
73
84
83
82
81
80
85
86
87
86
87
95
94
93
92
91
90
89
88
102
101
100
99
98
97
96
103
111
11
0
109
108
107
106
105
104
11
2
11
3
11
4
11
5
11
6
11
7
11
8
11
9
120
121
122
123
124
125
126
127
128
39
P7_3/
CT
S2#/
RT
S2#/
TA
1IN
//V
RESET#
P13_4
P8_3/
IN
T1#
P6_6/
RX
D1
P9_2/
TB
2IN
/S
OU
T3
VREF
XOUT
P12_6
P6_4/CTS1#/R
TS1#
P8_7/
XC
IN
P7_6/
TA
3O
UT
P8_4/
IN
T2#/
ZP
VCC1
CNVSS
P6_0/CTS0#/R
TS0#
P13_0
P8_5/
NM
I#
P8_1/
TA
4IN
//U
P6_5/CLK1
P9_
4/DA1
/TB4IN
P7_2/
CLK
2/T
A1O
UT
/V
P14_0
P5_3/BCLK
P8_0/
TA
4O
UT
/U
P6_3/TXD0/SDA0
BYTE
P9_
3/DA0
/TB3IN
P8_
6/XCOUT
P7_5/
TA
2IN
//W
P7_7/
TA
3IN
P5_4/HLDA#
P7_
0/T
XD2/SDA2
/TA0
OU
T
P9_1/
TB
1IN
/S
IN
3
P6_7/
TX
D1/
SD
A1
P13_2
P9_
7/ADT
RG#/SI
N4
P5_0/WRL#/WR#
P6_1/CLK0
P12_7
XIN
P5_2/RD#
P13_5
P5_5/HOLD#
P13_1
P14_1
P13_3
P5_7/RDY#/CLKOUT
P8_2/
IN
T0#
P9_
0/TB0
IN/CLK
3
AVC
C
P7_4/
TA
2O
UT
/W
P13_7
P12_5
P9_
6/ANEX1
/SOU
T4
P7_
1/RXD2
/SCL
2/TA0
IN/TB5IN
VSS
VCC1
P6_2/RXD0/SCL0
P13_6
P5_1/WRH#/BHE#
P5_6//ALE
P9_5/
AN
EX
0/C
LK4
P4_7/
CS
3#
P4_6/
CS
2#
P4_5/
CS
1#
P4_4/
CS
0#
P4_3/
A19
P4_2/
A18
P4_1/
A17
P4_0/
A16
A3_1/
A9
A3_2/
A10
A3_3/
A11
A3_4/
A12
A3_5/
A13
A3_6/
A14
A3_7/
A15
P12_0
P12_1
P12_2
P12_3
P12_4
VCC2
P3_
0/A8
(/-/D7
)
VSS
P2_0/
AN
2_0/A
0(/D
0/-)
P2_1/
AN
2_1/A
1(D
1/D
0)
P2_2/
AN
2_2/A
2(D
2/D
1)
P2_3/
AN
2_3/A
3(D
3/D
2)
P2_4/
AN
2_4/A
4(D
4/D
3)
P2_5/
AN
2_5/A
5(D
5/D
4)
P2_6/
AN
2_6/A
6(D
6/D
5)
P2_7/
AN
2_7/A
7(D
7/D
6)
P1_1/
D9
P1_2/
D10
P1_3/
D11
P1_4/
D12
P1_5/
D13/
IN
T3#
P1_6/
D14/
IN
T4#
P1_7/
D15/
IN
T5#
P1_0/D8
P0_0/AN0_0/D0
P0_1/AN0_1/D1
P0_2/AN0_2/D2
P0_3/AN0_3/D3
P0_4/AN0_4/D4
P0_5/AN0_5/D5
P0_6/AN0_6/D6
P0_7/AN0_7/D7
P1
1_7
P1
1_6
P1
1_5
P1
1_4
P1
1_3
P1
1_2
P1
1_1
P1
1_0
P10_7/AN7/K13#
P10_6/AN6/K12#
P10_5/AN5/K1
1#
P10_4/AN4/K10#
P10_3/AN3
P10_2/AN2
P10_1/AN1
AV
S
S
P10_0/AN0
VSS
R26
10
K
D1
1SS3
5
5
1
2
R27
10K
+
C19
10uF/10V
,OS
1
2
R60
0
C3
33pF
C14
1000pF
X3
C
S
T
L
S
16M
2
3
1
R84
10
K
R25
10K
R57
0
C1
12
0.1uF
R51
0
C13
27pF
R68
10
K
C16
33pF
C
111
0.1uF
RP8
10
K
3
2
1
4
5
6
7
8
+
C2
10uF/10V
,OS
1
2
+
C10
10uF/50V
1
2
C8
33pF
C20
330pF
R7
10K
R6
10
K
R81
1K
X1
32.768KH
z
1
2
R8
10
K
R70
470
RP2
10
K
3
2
1
4
5
6
7
8
R52
0
R9
10
K
IC3
FS781
1
3
4
5
6
8
2
7
XIN
S1
LF
VSS
FSOUT
VDD
XOUT
S
0
RP12
3
3
3
2
1
4
5
6
7
8
SP1
SHOR
T
PIN &
S
O
C
K
E
T
1
3
2
RP5
10
K
3
2
1
4
5
6
7
8
C1
17
0.1UF
R83
10
K
RP10
10
K
3
2
1
4
5
6
7
8
R59
10
K
Q1
2SC1815
3
1
2
R67
47
K
C7
33pF
C12
18pF
R87
10
K
R10
10
K
S
P
2
SHOR
T
PIN &
S
O
C
K
E
T
1
3
2
RP4
10
K
3
2
1
4
5
6
7
8
R94
33
R69
47
K
R75
330
RP9
10K
3
2
1
4
5
6
7
8
D2
1SS3
5
5
1
2
R31
10
K
R33
10
K
R56
0
C15
33pF
CHAPTER
6. C
IRCU
IT
DIA
G
R
A
M A
ND PWB
LA
Y
O
UT
1. CIRCUIT DIA
G
RAM
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